?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=K%C3%BCrbis&rft.au=K%C3%BCrbis%2C+N&rft.aufirst=N&rft.issue=4&rft.title=Bulletin+of+the+Section+of+Logic&rft.pages=299-317&rft.issn=2449-836X&rft.atitle=Two+Treatments+of+Definite+Descriptions+in+Intuitionist+Negative+Free+Logic&rft.volume=48&rft.date=31+December+2019&rft.genre=article